VGA arbitration: API proposal

[Jon Smirl]

On Mon, 7 Mar 2005 20:17:09 +0100, Egbert Eich <eich at suse.de> wrote:
> Jon Smirl writes:
>  > These are the two VGA address ranges
>  >
>  > 02B0-02DF    Alternate VGA Video Display Adaptor assignment (secondary address)
>  > 03B0-03DF    EGA / VGA Video Display Adaptor, (Primary address)
>  >
> 
> I don't know where you got these from. But the first set is not
> documented in any data book that I know of.
> Therefore I assume they are not decoded by these chips.

Older VGA cards used to have jumpers on them for primary or secondary
devices. This allowed two VGA cards in one machine on ISA.

-- 
Jon Smirl
jonsmirl at gmail.com